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H. W. SCHATZ. ELECTRKC DRWING MEANS FOR DRELUNG MACl-HNERY.

APPUCAIION HLED )UNE 9, l9?- 1 379,782. Patented May 31, 1921.

2 SHEETS-SHEET 1219612- for:

H. W. SCHAIZ NG MEANS HJI-i 08mm MACHIN APPLICATION FILE!) ILiNi 9.19M.

EHY.

ELECTRIC DRIVI for."

immted May 31, 1921.

PATENT. OFFICE.

HERMAN w. sermon, on NORWOOD, H1-

ELECTRIC DRIVING MEANS FOR DRILLITNG MACHINERY.

Specification of Letters Patent.

Application filed June 9, 1917. Serial No. 173,800.

, To all whom it may concem:

Be it known that L'HERMAN W. Scum-z,

a. citizen of the United States residing at Norwood, in the county of- Hamilton and State of Ohio, have invented certain new and useful Im' rovements in Electric Driving Means for rilling Machinery, of which the following is a specification. My invention relates to electric driving means for drilling machinery.

It is the object of my invention to provide driving means for a drilling machine, comprising an electric motor mounted upon the drill-arm and. distanced from the toolslide, and manual speed controlling means therefor moving with thetool-slide and positionecl convenient to the operator of the machine. a 1

It is the further object of my invention to so mount the electric motor upon the drillarm of the machine, as to counteract the weight of said arm and the tool slide supported thereby and to m0\'e with the arm when the latter is adjusted, and whereby frictional resistance In moving the drillarm n and down or swinging it about the axis 0 the column is minimized, and whereby, further the driving connection between 'the motive power and the cross-shaft extendlen thwise of the drill arm is simplified.

in la t e resent exemplificationof myinwntion, t e tool-slide is adjustable laterally upon the radial supporting arm, and. the electric motor for operating the toolspindle on the tool-slide isalso mounted on said am, the 5 weed of the electric mtX'm-zbeing controlled 1y manual controlling means movin with the laterally adjustable toolslide, o said manual controlling means 'havin ad'ustable mechanical connections witht e eeetric controlling means of the electric motor," instance as a drum-type controller mounted on said arm.

It is a further object of my'invent'on to so mount a'motor upon the swinging lrilling-machlne, asto per- 'mit the motor to be moved with the drillarm for all radial ositions of the latter, and

" enablin the" dri'l-arm with the motor menu, thereon to be moved about a complete circle without obstruction so as to preilentqthe tool for operation at any portion of a complete circle.

The invention will be I further readily {I understood from the following description and claims, and from the drawings, in which i? 4;'an

1g. 6 is an axial sectional (lthlll of the same t-akenon the line G-6 of Fig. 4.

Patented May 31, 1921 The drilling machine. which is excmplified as embodying my invention. includes a usual base 11, from which a usual post 12 extends upwardly in rigid relation, the post being. surrounded by a usual column 13 shown as a rotary column, haringa drillillmll mounted thereon. as by a bearing 15 surrounding the column. The base may extend from one side of the, post, or maysurround the post in the form of a circular base.-

The drill-arm is arranged to be raised and lowered to adjustable ositions on the column b suitable mechanism instanccd as an uprig t screw-redid having threaded connection with a nut 17 fixedly located in the drill-arm. The adjusting rod is journaled at its lower end in a bearing 21 and extends lengthwise "of the su mrting column. It is arranged to be rotated in either direction for either raising or lowering the drill-arm, and to bc'stopmd or started as desired, in any suitable or well-known mannot; under the manual control of the operator. After adjustment, the bearing is clamped to the column, as by usual clamps 25, it being understood that the lwaring 15 is a clamp-bearing which is unclam wd prior to adjustment on the column and clamped in )osition. to the column after adjustment. he supporting-column is arran ed to be rotated so as to position the dri l arm at any desired radial position,- preferably throughout the; entire extent of the three hundred and sixty degrees of'a circle, for po timing the drill-arm either with relation to a table '41 of the base, or, if desired, to the floor about the drillin machine. on which the work "ay be place or to a suitable circular base about thepost.

This'is shoivn sis eecomplished by-having V the column supported by a. usual bearinjg42 about the post 12, the bearing com rising an annular row ofenti-friet on rol ers 43 about the post. The bearing exemplified as a clamp-bearing so a's-to damp the 01111}!!! in adjusted positio s to the post by means of a usual bearing clamp 44 provided with an operating handle 45. An upper annular 5 bearing. 40 between the post and column side I in rotation of theeolumn.

A' tool-slide 46' is laterally adjustable upon the drill-arm 14. The later xl-adjustmentoofthe tool-slidemay be accomplished b providing thedrill-arm with-a rack 47, a a ted tQ-be enga d b a pinion 48, journals on the tool-sli e an manually actuated through suitable gearing by a hand-wheel 49 upon the tool-slide, for laterally adjusting the slide upon the drill-arm.

' In practice, the drill-arm, in present usual constructions, which extends' radiallyfrom supporting column 13, and the tool-slidewhich is adjustable laterally ,thereon. are heavy, and exert a heavy strain-on the bearing 15 of the drill-arm. about ;the .column.

This strain is increased as the-tool-slide is V adjusted toward the free end of the'radial arm, owing to the increase in leverage at the column. As a result'of this strain, there is a. constant tendenc 1 toward inaccuracy in the work performed by the machine towing to the tendency of the drill-arm tdsag. which results .in the drill-spindle 51, journ'aled in usual manner in, the tool-slide, moving out of parallelism with the vertical axis of thecolumn,v assuming the drill-spindle to be in normal up and down OSltIOIL In order to avoid tiese objections and the consequent inaccuracy in .woi'k, .and to pro- 1 ride for more ready adjustment of: the drill arm on the column. and to minimize frictional resistance between the hearing of the drill-arm nndthe column, I provide the drillarm With a bracket 52 extending laterally at the other side of the column from that atwhich the drill-arm proper is located, so that the drill-arm extends from one sideof the hearing about the column. and the bracket c'stcuds from the other'side of said lltul'll?! Y about the column, )referahly iliumctrical opposite to the dril -n1'm" proper. An elcc tric motorjfiilior operating'the drill-spindlc, IS mounted upon this bracket, the weight of the bracket and motor acting:rountclflto theweight ofthc. drill-arm and spindle, at oppo-' sitc sides of the column. for substantially halanoinfi the weightsupported by the column.

The electric motor is arranged to operate the usual driving and feeding means which aremounted on the tool-slide for operating the drill-spindle, preferably through the usual drive-shaft 35 extending lengthwise of the radial drill-arm, which operates a usual- ..the tool-slide is admsted.

train of gearinglfi t on the tool-slide ing or stopping the drill-spindle and for rotatingihe same in either direction, and for'j feeding the same, a portionof this train oi.

, being instanced as bevel-gears 55, 56, aving' usual selective clutch 4 connectioni'ititha sleeye .57 -about the shaft 35 as by a.

haiidl'e- 50, said sleeve having usua s lineconnection 5 8 With'said shaft, for 0 rated b said shaft, in usualmanner alt a. 1 edjuste positionsof the toollide. "he

- trolled by a suitable electric control devicq exemplified as a-rotary'rheostat or drum the so The motor is rigidly secured to the 1 i ing Y 'controller 71, which'electrically controls the speed of rotation of -the nrmatureshafl; 59 of the electric motor. The drum controller is shown secured to the motor-frameby bolts 72. 'The-electriccontrol devicefof the slee tric motor is manually controlled by manual controlling means moving laterally yvith the I tool-slide, the manualcontrol device having f.

meehnnism extending therefrom to the electric. control device so arranged that said eonnectiouis effective for moving said electric 100 control device at all adjusted operative positions of the tool-slide some to start or stop or vary'the speed of the motor by' monipulation of said manual oontroljdeviee at the operators position in front of the tool-slide, regardless of the operative position which .105

The drum controller may he of usual con,-

strmction for controlling the speed of the aimnture shaft of the electric motor by movement ofthe-movable memhenof the drum controller, instaneed-as a rotation of the shaft 73. of the drumcontroller, which selectively efiectsicqaction between various electric contacts '74,. 75, in the drum con t-roller' for: varying the speed ofthe motor and stopping-on starting the same.

-The= controlling mezi ns for'igthe' electric" control device is exemplified as. comprising a shaft to, extending; lengthwise of ,the 'rudial drill-arm and'ada ted to be menu ally rotated by a shaft 77. which is shiftable with the tool-slide along the radial drill-arm. 1

lustancing this arrangement, theshaft 77 may be journaled in bearings 68 78, of brackets 69, 79, secured to the tool-slide; 'shiftahle driving eonnectionis formed be tween shafts 77 and 76, which may comprise a bevel-gear 80 fast upon shaft/77 and meshmg with a second bevel-gear 81, having spline-connectionwith shaftlti, sliownat' 82. The bevel-gear 81 having'spline-eonnection with shaft 76,'is arranged tobe moved lengthwise along the shaft so as to remain in mesh with beveLgear'SO, whenrthetoolslide is adjusted laterally upon the drillarm'. This is preferably accomplished by journaling the hub 83 of bevel-gear 81 ,in

- a bearing 84 of the bracket 79 which is secured to the tool-slide, the bearingIBA being located between a shoulder 85 on said gear 81 and a'collar 86 secured to its hub 83.

Shaft 77, which i's thus arranged to rotate shaft 76 for controlling the rotation of the movable memberof the electric control device, is exemplified as provided-with. a hand-wheel 88, which is preferablpositioned at the front of the tool-sli e,- 0on venient to e the operator of the machine when standing in usual position in front of the tool-slide of the machine. The handwheel is instanced as rovided with a aduated dial-face 89, w ich is rotatab y adjustable with relation toafixed indicator speeds.

The shaft 73 of the electric control device has a sprocket-wheel '94 fixed thereto. A sprocket-Wheel .95 is fixed to the shaft 76, a sprocket-chain 96 bein received about the sprocket-wheels 94, 95, or actuating the. movable part ofthe electric control device and thereby effecting the starting or stoppinfi of the motor or varyin its speed. y y improved device provi es simple driv t.

.slide.

down on said column, a tool-slide adjustable laterally on said drill-arm, a drill-spindle 'oiirnaled on said tool-slide, a'shaft exten ing len thwise of said drill-arm for opcrating sair drill-spindle, an electric motor on said drill-arm 'for drivingsairhlastnamedshaft, an electric control device supported by and moving with said drill-arm for controlling the speed of said electric 'motor, a second shaft extending lengthwise of said drill-arm having operative connection with said electric control device for operating the same,and an operating part moving with said tool-slide, said operatin .part having driving connection with said second shaft for rotating said second shaft bymeans of said operating pzirt'at the various positions of adjustment of said tool- 3. In a drilling machine, the combination of a column, a bearing movable up and down on saidcolumn, a drlll-arm extending from one side of saidbearing, a bracket extend ing from the opposite side of said bearing,

-a tool-slide, means for adjusting said tool- .slule laterally on said drill'arm, an electric motor supported by said bracket, an electric control device moving with said bearing for controlling the sieed of said' motor, a shaft extending lengt wise of said drill-arm, a manually operated part moving with said tool-slide, gearing having rota tire conneetio'nwith said shaft and slidable .with said manually operated part and toolslide lengthwise otsaid shaft, and operating connecting means between said shaft and electric control device. a

4; In a drilling machine, the combination of .a column. a bearing thereon adjustable up and down, a drill-arm extending from one side of said bearing, a bracket, extending from the other side of said bearing, a

' 'ing-means for the drill-s indie, mountednsgtool slide sl-idable laterally onsaid drilland moving with the dri l-arm for enabling the drill-arm to be moved about a complete circle without obstruction, "and )rovides simple control means for the. electric motor at all times within easy reach of the operator.

Havin thus fully described my invention, what'I c aim as new and to secure by Letters Patent, is: it

1. In a drillin 1 machine, thea-ombination of a column, a di'ill-arm adjustable up and down on. said column, a tool-spindl adjustable laterally on saidzdrill-arrman lectric motor mounterbon aid drill-arm having operative connection with said toolspmdle for operating the same, an electric control device on sand drill-arm distanced from said tool-slide, and a manual control moving with said tool-slide for said -electric control device for operating the latter.

2. In a drillin' machine, the combination of a column, a rill arm adiustable up and ar n, an electric motor supported by said bran-1m, an electric speed control device forthc latter moving with sauhbearing, a shaft passing sald column having" operative connection with said electric speed control;

device, and a mamially operated part mounted on and movable with said tool operativc positions of said toolnaled on said drill-arm, gearing between signed my name in the presence of two subsaid shaft and electric speed control describing witnesses.

vice for 0 eratin the latter, and a hand 7 control moiiing wi%h said tool-slide and hav- HERMAN SLHATZ ing operative slide connection with said Witnesses: A shaft fur rotating the same. THERESA M. Smann,

In testimony whereof I have hereunto DAWSON E. BRADLEY. 

